Study of kinetics and properties of polystyrene/silica nanocomposites prepared via in situ free radical and reversible addition-fragmentation chain transfer polymerizations
作者： M. Salami-Kalajahi , V. Haddadi-Asl , H. Roghani-Mamaqani
DOI: 10.1016/J.SCIENT.2012.10.003
关键词:
摘要: Abstract A number of batch polymerizations were performed to study the effect pristine nanoparticle loading on kinetics free radical and RAFT properties polystyrene/silica nanocomposites. To polymerization, Conversion, molecular weight polydispersity index (PDI) monitored during polymerization investigate reaction kinetics. According results, adding nanoparticles causes no considerable change in kinetic curves, while there is an optimum value for which monomer conversion reaches its maximum level. However, increasing silica content resulted increase PDI values. In comparison with lower polymerization. The prepared samples characterized by thermogravimetric analysis (TGA), Dynamic Mechanical Thermal Analysis (DMTA), Differential Scanning Calorimetry (DSC). TGA samples, one stage degradation related random chain scission observed nanocomposites has occurred two steps due decomposition moieties scission. Also, best improvement mechanical thermophysical achieved containing 5 wt% nanoparticles.
core.ac.uk
elsevier.com
sci-hub.se 参考文章(32)
Yoshinobu Tsujii, Muhammad Ejaz, Koichi Sato, Atsushi Goto, Takeshi Fukuda, Mechanism and kinetics of RAFT-mediated graft polymerization of styrene on a solid surface. 1. Experimental evidence of surface radical migration Macromolecules. ,vol. 34, pp. 8872- 8878 ,(2001) , 10.1021/MA010733J
Timothy von Werne, Timothy E. Patten, Atom Transfer Radical Polymerization from Nanoparticles: A Tool for the Preparation of Well-Defined Hybrid Nanostructures and for Understanding the Chemistry of Controlled/“Living” Radical Polymerizations from Surfaces Journal of the American Chemical Society. ,vol. 123, pp. 7497- 7505 ,(2001) , 10.1021/JA010235Q
Mohammad Barari, Naser Sharifi-Sanjani, Synthesis of poly(methyl methacrylate)/silica nanocomposite through emulsion polymerization using dimethylaminoethyl methacrylate Journal of Applied Polymer Science. ,vol. 110, pp. 929- 937 ,(2008) , 10.1002/APP.28706
Chun-Hua Liu, Cai-Yuan Pan, Grafting polystyrene onto silica nanoparticles via RAFT polymerization Polymer. ,vol. 48, pp. 3679- 3685 ,(2007) , 10.1016/J.POLYMER.2007.04.055
Jung-Dae Cho, Yang-Bae Kim, Hyoung-Tae Ju, Jin-Who Hong, The effects of silica nanoparticles on the photocuring behaviors of UV-curable polyester acrylate-based coating systems Macromolecular Research. ,vol. 13, pp. 362- 365 ,(2005) , 10.1007/BF03218467
Daoben Hua, Jing Tang, Jianlin Jiang, Zhouquan Gu, Liangliang Dai, Xiulin Zhu, Controlled grafting modification of silica gel via RAFT polymerization under ultrasonic irradiation Materials Chemistry and Physics. ,vol. 114, pp. 402- 406 ,(2009) , 10.1016/J.MATCHEMPHYS.2008.09.046
Andreas Schmid, Syuji Fujii, Steven P. Armes, Polystyrene-silica nanocomposite particles via alcoholic dispersion polymerization using a cationic azo initiator. Langmuir. ,vol. 22, pp. 4923- 4927 ,(2006) , 10.1021/LA060308P
Fusheng Li, Shuxue Zhou, Bo You, Limin Wu, Kinetic investigations on the UV-induced photopolymerization of nanocomposites by FTIR spectroscopy Journal of Applied Polymer Science. ,vol. 99, pp. 1429- 1436 ,(2006) , 10.1002/APP.22629
Mehdi Salami-Kalajahi, Leila Hatami, Vahid Haddadi-Asl, Hossein Roghani-Mamaqani, Leila Ahmadian-Alam, Synthesis and Characterization of Poly(Styrene-co-Butyl Acrylate)/Clay Nanocomposite Latexes in Miniemulsion by AGET ATRP Polymer Composites. ,vol. 32, pp. 967- 975 ,(2011) , 10.1002/PC.21115
Hossein Roghani-Mamaqani, Vahid Haddadi-Asl, Mohammad Najafi, Mehdi Salami-Kalajahi, Synthesis and characterization of clay dispersed polystyrene nanocomposite via atom transfer radical polymerization Polymer Composites. ,vol. 31, pp. 1829- 1837 ,(2010) , 10.1002/PC.20975